Vibratory jack



Patented Oct. 17, 1939 VIBRATORY JACK Lewis E. Porter, Philadelphia, Pa., assigner to Globe Hoist Company, Des Moines, Iowa, a corporation of Iowa Application December 17, 1937, Serial No. 180,365

1 Claim.

Jacks of this class are now in general use for the purpose of aiding operators in greasing automobiles, particularly the' springs thereof, and the automobiles being serviced are usually held in elevated position upon an automobile lift. These jacks usually employ a motor driven by compressed air for imparting the desired vibrating movement.

The object of my invention is to provide a jack of this class of simple, durable and inexpensive construction, and which is designed to rest upon the floor so that it may be readilyand easily moved to position for engaging any part of an automobile supported above the oor upon a lift.

More specically, it is my object to provide a jack of this class which may be easily and quickly adjusted as to length s o that it may be brought into engagement with the desired part of an automobile, and thereafter quickly and easily operated to elevate the adjacent portion of an automobile and securely hold it in such elevated position for convenience in greasing or servicing the automobile.

In the accompanying drawing- Figure 1 shows a side elevation of my improved vibratory jack with portions of an automobile lift and automobile thereon; the dotted lines show the position of the jack and the part of the automobile shown when elevated by the lever;

Figure 2 shows an enlarged detail sectional view of the head member and sliding tubular member thereon;

Figure 3 shows an enlarged sectional view on the line 3--3 of Figure 1; and

Figure 4 shows an enlarged detail sectional view of the head and tubular sliding member taken from position at right angles to that shown in Figure 2 and illustrating the screw-threaded rod and automobile frame engaging bracket thereon.

Referring to the accompanying drawing I have used the reference numeral I to indicate a base member designed to rest upon a floor and having pivotally mounted therein a compressed air motor indicated generally by the reference numeral II and which is operated by compressed air through a pipe I2 controlled by manually operable valve I3. When the valve I3 is opened the motor vibrates up and down. This motor forms no part of my present invention, and such motors are in general use.

Mounted upon and fixed to the motor and base is a tubular upright supporting member I4. At the top of this supporting member is a tubular head I5 having at its top an inwardly extended flange I6. This tubular member is designed to receive the tubular upright I4, and said flange, is designed to engage and rest upon the top 0f the tubular upright I4.

Slidingly mounted upon the exterior of the head I5 is a tubular member I'I having an inwardly extended ange I8 at its top to rest upon the flange I6 when at its lower limit of movement.

Formed in the head I5 is a vertical slot I9, and a screw is seated in the tubular member I8 and projected into said slot for maintaining proper relative position between the head I5 and tubular member Il. A friction spring 2l is also carried by the tubular member II and serves to press a ball 22 against the outer surface of the head I5, which head is formed with a notch 23 to receive said ball when the tubular member is at its lower limit of movement to frictionally hold it in such position.

Formed on the outer surface of the tubular member I'I are two lugs 24 upon which are mounted rollers 25. Formed on the head I5 are two outwardly extended fulcrum members 26. A lever 21 is provided, and this lever has two arms 28. These arms are formed near their outer ends with cam-shaped surfaces 29, and beyond the cam-shaped surfaces are the notches 30. Thesecam-shaped surfaces are so shaped and proportioned that when the handle of the lever 2'I is moved from its upper position, as shown by solid lines in Figure 1, to its lower position, as shown by dotted lines in said ligure, the camshaped surfaces will engage the rollers 25 to thereby elevate the tubular member I1, and at the end of the elevating movement the rollers will enter the notches and thereby the tubular member I'I will be supported in its elevated position, from which it may be moved by an upward movement of the lever. A screw-threaded rod 3| is slidingly extended through the head I5, the tubular member I1 and the upper end of the hollow upright I4, as shown in Figure 4. On the upper end of this screw is an automobile engaging bracket 32, and a nut 33 is mounted upon the screw 3|` and engages the .top of the sliding member I'I. This screw is loosely mounted and is intended to be rotated by hand.

In Figure 1 I have shown a portion of an ordinary automobile lift which is indicated generally by the reference numeral 34, and I have shown a portion of an automobile frame indicated by the reference numeral 35.

In practical operation, and assuming that an automobile to be serviced was mounted upon an ordinary automobile lift in an elevated position, then if the operator desires to vibrate a portion of this automobile for the purpose of greasing the springs or the like, then he grasps the vibratory jack, which may be conveniently done by grasping the upright I4 which is normally supported in its upright position upon the :door by the base l0. He then moves the jack to any desired position with relation to the automobile, and since the jack is supported upon the floor and not upon any part of the automobile lift, the operator may place it at any, desired position. When the jack has thus been placed, the operator simply rotates the hand nut 33 and turns it in the direction for elevating the bracket 32, and this is continued until the bracket 32 touches the automobile frame, and this may be done quickly and easily because the operator does not elevate the automobile frame by the manipulation of the nut,33. When this point is reached, the operator simply grasps the handle of the lever 21 and moves it downwardly. This will cause the camshaped surfaces 29 of the lever to engage the rollers 25 and thereby rapidly elevate the tubular member Il, the nut 33, and the bracket 32, and thereby the frame of the automobile will be elevated at the point where the jack is applied.

When it is desired to lower the automobile the operator again grasps the lever 21 and moves it upwardly, thus relieving all strain upon the nut 33 which may again be turned by hand to position for withdrawing the jack from the automobile.

I claim as my invention:

A vibratory jack comprising a base, a tubular upright carried by the base, means on said base for imparting a vibratory vertical movement of the tubular upright, a tubular head mounted upon the upper end of the tubular upright, fulcrum pins extended outwardly from opposite sides of the tubular head, a lever having two arms fulcrumed to said pins and being formed with cam surfaces and with notches, a tubular member slidingly mounted on the tubular head, two rollers mounted on opposite sides of the tubular member above and in vertical alignment with the said fulcrum pins and positioned to be engaged by said arms, an upright jack member extended through said tubular member and vertically movable relative thereto and supported by said tubular member when in various positions of its vertical movement.

LEWIS E. PORTER. 

